Portion of tissue, that consists of one or more layers of epithelial cells connected to each other by cell junctions and which is underlain by a basal lamina. Examples: simple squamous epithelium, glandular cuboidal epithelium, transitional epithelium, myoepithelium[CARO].
Comment:
Editor note: surface epithelium may contain non-epithelial cells, such as melanocytes, lymphocytes and dendritic cells, within the sheet of epithelial cells. Do we consider these part of the epithelium, or located-in it?; [homology-note] "The two basic types of metazoan tissue are epithelial and connective. The simplest metazoans, and developmental stages of many primitive invertebrates, consist solely of these two layers. Thus, epithelial and connective tissues may be the primary (original) tissues of metazoans, and both are important in the functional organization of animals.[well established][VHOG]" xsd:string {date_retrieved="2012-09-17", external_class="VHOG:0000387", ontology="VHOG", source="ISBN:978-0030259821 Ruppert EE, Fox RS, Barnes RD, Invertebrate zoology: a functional evolutionary approach (2003) p.59", source="http://bgee.unil.ch/"}